.lab-buttons-wrapper.lab-button-hidden-on-load .lab-button {
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lab-buttons-wrapper.lab-button-hidden-on-load:hover .lab-button {
    opacity: 1;
    visibility: visible;
}

.lab-buttons-wrapper .lab-button-never-show {
    display: none !important;
}